Are they exactly the same detail? To put it simply, no. Recall that nerves are present in the PNS, and therefore are composed of bundles of nerve fibers (axons). The neurons Conversely are only the cells from the anxious process. Some nerve fibers (axons) and are enveloped in myelin sheath, https://www.theorthopaedicandpainpractice.com/understanding-burning-pain-in-the-upper-right-arm-causes-symptoms-and-treatment-options/